Perspectives of Using L-Tryptophan for Improving Productivity of Agricultural Crops: A Review

查看全文 作　　者：Ayesha [1]MUSTAFA;Muhammad [1]IMRAN;Muhammad [1]ASHRAF;Khalid [1]MAHMOOD

机构地区：[1]Soil and Environmental Sciences Division, Nuclear Institute for Agriculture and Biology (NIAB)

出　　处：《Pedosphere》索引2018年第28卷第1期,共19页

摘　　要：Plant growth regulators are biologically active signaling molecules that regulate a number of plant physiological processes. Auxin(indole-3-acetic acid) is an important plant growth regulator and is synthesized within plant tissues through L-tryptophan(L-TRP)-dependent and-independent pathways. It has been found that plants respond to exogenously applied L-TRP due to insufficient endogenous auxin biosynthesis. The exogenous application of L-TRP is highly significant for normal plant growth and development.L-tryptophan is applied through foliar spray, seed priming, and soil application. Soil-applied L-TRP is either directly taken up by plants or metabolized to auxin by soil microbiota and then absorbed by plant roots. Similarly, foliar spray and seed priming with L-TRP stimulates auxin synthesis within plants and improves the growth and productivity of agricultural crops. Furthermore, L-TRP contains approximately 14% nitrogen(N) in its composition, which is released upon its metabolism within a plant or in the rhizosphere and plays a role in enhancing crop productivity. This review deals with assessing crop responses under the exogenous application of L-TRP in normal and stressed environments, mode of action of L-TRP, advantages of using L-TRP over other auxin precursors, and role of the simultaneous use of L-TRP and auxin-producing microbes in improving the productivity of agricultural crops. To the best of our knowledge, this is the first review reporting the importance of the use of L-TRP in agriculture. 关键词：生产率色氨酸庄稼农业评论植物生长素新陈代谢管理者

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Perspectives of Using L-Tryptophan for Improving Productivity of Agricultural Crops: A Review

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